I would see if you can find out the high voltage range (i.e. The Grace I have output more like 110V under load instead of 120V and I verified with Schoeps that this would be ok before I tried to run a show on it).

The more critical voltage is the filament voltage (i.e. AC701 tube needs to be within 0.2 V of 4 V or you will start to damage the tube and shorten the lifespan) - don't know about the EF732 it seems to be a newer design than the 701 so it may have greater tolorances.

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Music can at the least least explain you and at the most expand youLMA Recordings

I ran the DC box last night for the first time. Everything went very smoothly. I ran the Telefunkens stagelip XY for a multitrack recording. I used a Tekkeon 3450 to power the DC box and my Microtrack 2 off the USB. After the show (2hr 30min) I still had 5 of the 8 LEDs on the Tekkeon, so battery life will not be a concern. So far, so good!

My old Atwater-Kent used two batteries, A and B"A" voltage was for filament and it came from the A-battery; "B" voltage fed the plates and (oddly) came from the B-battery. (B+)Sometimes a "C" cell was used to power grids, but usually a rheostat could provide it, tapped off of the B+ line.

Then the power company came along an put up all those dag-burned poles and it all changed.Lot of good men lost putting up those wires, back in the day, yessiree.No one even remembers the sacrifices made to bring utilities to these here parts atall.

Be careful with 120 vdc field wiring, it can burn and/or kill.In fact, high DC voltages are even more dangerous than wall outlets.

« Last Edit: May 07, 2010, 11:44:57 AM by 6o6 »

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